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What would cause this Front Tire failure?

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Old Yesterday | 06:57 AM
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Default What would cause this Front Tire failure?

This is a stock HD Dunlop tire on the front of a 21 SGS with just under 13k miles.

Tire repair pressure is closely monitored and always at 36psi.

We rode the bike a few days ago for 89 miles and I did not notice anything out of the ordinary.

While installing a new tire I saw this and was shocked.

There Ie a dimple around each slit.

The inside of the tire looks and feels perfect.

Could this be caused from an impact ?
















New tires now on front & rear.





 
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Old Yesterday | 07:18 AM
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My guess would be a hard impact, pothole etc. Did you see any dents on the rim?
 
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Old Yesterday | 07:23 AM
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Looks like a delamination or separation to me. Might be worth a note to Dunlop to see what they say. Good thing it was tire time, that may not have ended well, especially being a front tire.
 
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Old Yesterday | 07:31 AM
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Looks bad, did you feel and hear it slapping?
What brand is the new one w the Drag sticker?
 
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Old Yesterday | 07:33 AM
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Mark, to me that looks like external force damage. The fact it is very symmetrical and appears almost cleaved is telling to me. I can't possibly imagine a 'natural' carcass failure producing that type of appearance. But then again....never say 'never'. Great lesson on the need to lift a bike regularly and do a full rotational visual inspection of tires. That could've been disastrous if it failed at any highway speed. I do know one thing absolutely. You can run over a very unnoticed or unsubstantial object or hazard and produce mc tire damage without awareness. I once hit an object which was small and not seen, but was felt. It damaged both tires with the rear tire having a ragged hole that 3 truck tire plugs wouldn't fill. How small was the object? I'll never know. I walked back with my wife and we searched the exact area for half an hour looking for anything...and found nothing.

I now visually inspect tires with every oil change or inflation. Literally too much riding on them to take a chance.
 
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Old Yesterday | 07:36 AM
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Date code on the removed tire? Although it was on a 2021, it might be older than 2021, date code will tell month and year of manufacturer.
 
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Old Yesterday | 08:23 AM
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[QUOTE=GBHH;222822What brand is the new one w the Drag sticker?[/QUOTE]

Michelin
 
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Old Yesterday | 08:54 AM
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Sad to see this still happening. I had a Dunlop fail at 2500 miles on my 12 streetglide.
 
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Old Yesterday | 09:03 AM
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I can't necessarily say I ever liked the oem HD Dunlops. Just had issues. My Dunlop AE and AE2 tires have been nothing but excellent in terms of wear, performance and reliability.

....and now I'm going to go find some wood to knock on.
 
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Old Yesterday | 09:09 AM
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Originally Posted by Cosmic Razorback
This is a stock HD Dunlop tire on the front of a 21 SGS with just under 13k miles.

Tire repair pressure is closely monitored and always at 36psi.

We rode the bike a few days ago for 89 miles and I did not notice anything out of the ordinary.

While installing a new tire I saw this and was shocked.

There Ie a dimple around each slit.

The inside of the tire looks and feels perfect.

Could this be caused from an impact ?
















New tires now on front & rear.




y

I'd say you ran over something "just wrong" for that to happen.
 
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